Libc-391.2.3.tar.gz

[apple/libc.git] / sys / OpenBSD / stack_protector.c

diff --git a/sys/OpenBSD/stack_protector.c b/sys/OpenBSD/stack_protector.c
deleted file mode 100644 (file)
index 368e365..0000000
--- a/sys/OpenBSD/stack_protector.c
+++ /dev/null
@@ -1,75 +0,0 @@
-/*
- * Copyright (c) 2002 Hiroaki Etoh, Federico G. Schwindt, and Miodrag Vallat.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#if defined(LIBC_SCCS) && !defined(list)
-static char rcsid[] = "$OpenBSD: stack_protector.c,v 1.3 2002/12/10 08:53:42 etoh Exp $";
-#endif
-
-#include <sys/param.h>
-#include <sys/sysctl.h>
-#include <syslog.h>
-
-long __guard[8] = {0, 0, 0, 0, 0, 0, 0, 0};
-static void __guard_setup(void) __attribute__ ((constructor));
-void __stack_smash_handler(char func[], int damaged __attribute__((unused)));
-
-static void
-__guard_setup(void)
-{
-  int fd;
-  if (__guard[0]!=0) return;
-  fd = open ("/dev/urandom", 0);
-  if (fd != -1) {
-    ssize_t size = read (fd, (char*)&__guard, sizeof(__guard));
-    close (fd) ;
-    if (size == sizeof(__guard)) return;
-  }
-  /* If a random generator can't be used, the protector switches the guard
-     to the "terminator canary" */
-  ((char*)__guard)[0] = 0; ((char*)__guard)[1] = 0;
-  ((char*)__guard)[2] = '\n'; ((char*)__guard)[3] = 255;
-}
-
-void
-__stack_smash_handler(char func[], int damaged)
-{
-  const char message[] = "stack overflow in function %s";
-  struct sigaction sa;
-
-  /* this may fail on a chroot jail, though luck */
-  syslog(LOG_CRIT, message, func);
-
-  bzero(&sa, sizeof(struct sigaction));
-  sigemptyset(&sa.sa_mask);
-  sa.sa_flags = 0;
-  sa.sa_handler = SIG_DFL;
-  sigaction(SIGABRT, &sa, NULL);
-
-  kill(getpid(), SIGABRT);
-
-  _exit(127);
-}